Nail brush



FIG. 1 is a top perspective view of a nail brush;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a first side elevation view thereof;

FIG. 6 is a second side elevation view thereof;

FIG. 7 is a front elevation view thereof;

FIG. 8 is a rear elevation view thereof;

FIG. 9 is an enlarged perspective view of FIG. 1; and,

FIG. 10 is an enlarged perspective view of FIG. 2.

The broken lines shown in the drawings illustrate environmental structure of the article of manufacture, and form no part of the claimed design. 

CLAIM The ornamental design for a nail brush, as shown and described. 